Question

If the area of a circle is 154 cm2, then its perimeter is​?

Answer 1

Answer: 24.9cm

Step-by-step explanation:

Area of the circle = π$r^{2}$

Given : 154$cm^{2}$

π$r^{2}$ = 154

3.14 × $r^{2}$ = 154

3.14 × r = √154

r = 12.4 /3.14

= 3.9cm

Now, it's circumference = 2πr

= 2×3.14×3.9

=24.49cm

Hope it helps you!

Answer 2

Answer:

Using the formulas

A = π r²

C = 2πr

Solving for C

C = 2 sq.(πA)

= 2× sq.(π × 154)

≈ 43.99115

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Step-by-step explanation:

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